Sex and gender roles in the Roman Catholic Church have been the subject of both intrigue and controversy throughout the Church's history. The cultural influence of the Catholic Church has been vast, particularly upon Western society. Christian concepts, introduced into evangelized societies worldwide by the Church, had a significant impact on established cultural views of sex and gender roles. Human sacrifice, slavery, infanticide and polygamy practiced by cultures such as those of the Roman Empire, Europe, Latin America and parts of Africa came to an end through Church evangelization efforts. Historians note that Catholic missionaries, popes and religious were among the leaders in campaigns against slavery, an institution that has existed in almost every culture and often included sexual